Convertible backpack with shoulder bag strap system



FIG. 1 is an oblique side view of the convertible backpack and shoulder bag strap system;

FIG. 2 is rear view of the convertible backpack and shoulder bag strap system;

FIG. 3 is left side view of the convertible backpack and shoulder bag strap system;

FIG. 4 is a right side view of the convertible backpack and shoulder bag strap system;

FIG. 5 is a front view of the convertible backpack and shoulder bag strap system;

FIG. 6 is a top view of the convertible backpack and shoulder bag strap system;

FIG. 7 is a bottom view of the convertible backpack and shoulder bag strap system; and,

FIG. 8 is a rear view of the convertible backpack and shoulder bag strap system with the strap pulled upwardly.

The broken lines in the drawings depict portions of the convertible backpack and shoulder bag strap system that form no part of the claimed design. 

CLAIM The ornamental design for convertible backpack and shoulder bag strap system, as shown and described. 